Grammar Exercise: Present Perfect Continuous and Past Perfect Continuous Error

1. I'd been working for a very bad company when I met my present boss, who offered me this job.
    Correct
    Not Correct

2. Don, sit down and relax! You've been working like crazy for eight hours.
    Correct
    Not Correct

3. Mary has been visiting Russia six times already. She has a real affinity for the country.
    Correct
    Not Correct

4. In 1975, after seven years in prison, Carson had been leaving and started a new life.
    Correct
    Not Correct

5. Why do your eyes look so tired? Have you been watching TV without your glasses again?
    Correct
    Not Correct

6. Diana is a nurse at the local children's hospital. She's been looking after sick kids.
    Correct
    Not Correct

7. I've been saying it for years - young criminals should go back to school and get a proper education!
    Correct
    Not Correct

8. We ran like crazy for five blocks, but when we got to the train station, the express to New York had already been leaving.
    Correct
    Not Correct